Vapor chamber and electronic device

Abstract

A vapor chamber in which an enclosed space is formed, and a working fluid is sealed in this space, the enclosed space including: a plurality of condensate flow paths through which a fluid that is the working fluid in a condensing state flows; and vapor flow paths through which a vapor that is the working fluid in a vaporizing state flows, wherein each of projecting parts with which each of the vapor flow paths is provided has a projecting amount varying in an extending direction of the vapor flow paths; a pitch for opening parts that allow the vapor flow paths and the condensate flow paths to communicate varies in the extending direction of the vapor flow paths; or wall parts that separate the flow paths each have a given relationship with a transverse cross section of a given flow path.

1 . A vapor chamber comprising:
 an enclosed space formed thereinside, a working fluid being sealed in the enclosed space;   a condensate flow path in the enclosed space, a fluid that is the working fluid in a condensing state flowing in the condensate flow path;   a vapor flow path in the enclosed space, a vapor that is the working fluid in a vaporizing state flowing in the vapor flow path; and   a groove formed on a flow path face of the condensate flow path.   
     
     
         2 . The vapor chamber according to  claim 1 , further comprising:
 a plurality of laminated sheets, the sheets forming the enclosed spaces, wherein   the grooves are arranged on boundaries between the sheets on the flow path faces.   
     
     
         3 . The vapor chamber according to  claim 1 , wherein
 the groove has a cross-sectional shape in such a manner that a width is narrowing from an opening of the groove to an inside of the groove.   
     
     
         4 . The vapor chamber according to  claim 1 , wherein
 the groove extends while encompassing a component of a direction parallel to a direction where the condensate flow path extends.   
     
     
         5 . The vapor chamber according to  claim 1 , wherein
 the groove extends in a longitudinal direction at least twice as long as an opening width of the groove.   
     
     
         6 . The vapor chamber according to  claim 1 , wherein
 the condensate flow path has a curved shape in a cross-sectional view.   
     
     
         7 . The vapor chamber according to  claim 1 , wherein
 the groove is provided on only part of the condensate flow path in a direction where the condensate flow path extends.   
     
     
         8 . An electronic device comprising:
 the vapor chamber according to  claim 1 .   
     
     
         9 . A sheet for a vapor chamber, the vapor chamber being formed by laminating the sheet and at least one other sheet, the vapor chamber having a hollow part, the sheet comprising:
 a condensate flow path in the hollow part, a fluid that is a working fluid in a condensing state flowing in the condensate flow path;   a vapor flow path in the hollow part, a vapor that is the working fluid in a vaporizing state flowing in the vapor flow path; and   a groove formed on a flow path face of the condensate flow path.   
     
     
         10 . The sheet according to  claim 9 , wherein
 the grooves are arranged on boundaries between the sheets on the flow path faces.   
     
     
         11 . The sheet according to  claim 9 , wherein
 the groove has a cross-sectional shape in such a manner that a width is narrowing from an opening of the groove to an inside of the groove.   
     
     
         12 . The sheet according to  claim 9 , wherein
 the groove extends while encompassing a component of a direction parallel to a direction where the condensate flow path extends.   
     
     
         13 . The sheet according to  claim 9 , wherein
 the groove extends in a longitudinal direction at least twice as long as an opening width of the groove.   
     
     
         14 . The sheet according to  claim 9 , wherein
 the condensate flow path has a curved shape in a cross-sectional view.   
     
     
         15 . The sheet according to  claim 9 , wherein
 the groove is provided on only part of the condensate flow path in a direction where the condensate flow path extends.